(3x^2+6x*y^2)dx+(6*x^2*y+4y^3)dy=0是不是恰当方程

∫[(x^2-x+6)/(x^3+3x)]dx 解方程(2x-4y+6)dx+(x+y-3)dy=0 dy/dx=2y/x+3x/2y （-2x-y+9)dy=(-y+x+3)dx 求不定积分dx/x^2-x+6 ∫(√(x^2+6x))dx ∫x^6/1+x^2dx 5.求微分方程 dy/dx-6y/x=-2x^3的通解,急, 微分方程 dy/dx=(e^y+3x)/x^2 求方程 dy/dx+x(y-x) +x^3(y-x)^2=1的通解~ 求不定积分1.∫x√x dx 2.∫x^2√x dx 3.∫dx/x^2 4.∫6x^3dx √x dx 表示根号xdx ∫cos x / ( 1 + (sinx)^2 ) dx = ∫x^3 / ( 1 + x^4 ) dx = ∫(sec x)^3 * tan x dx = ∫x^2 * e^(-2x) dx = ∫x * cos 2x dx = ∫(cos 2x)^2 dx = ∫(13x - 6) / ( x (x-2)(x+3) )dx = ∫(x^2 + 2x - 2) / ((x-2)(x+1)) dx = 请把过程写出来哈.>< 旷 这个怎恶魔算∫cos x / ( 1 + (sinx)^2 ) dx = ∫x^3 / ( 1 + x^4 ) dx = ∫(sec x)^3 * tan x dx = ∫x^2 * e^(-2x) dx = ∫x * cos 2x dx = ∫(cos 2x)^2 dx = ∫(13x - 6) / ( x (x-2)(x+3) )dx = ∫(x^2 + 2x - 2) / ((x-2)(x+1)) dx = 3X^2+4X^3y-5y^2+sin(y)=6 求dy/dx z=x^2-y/x+y,而y=2x-3,求dz/dx. dy/dx,y=(1+x+x^2)e^x dy/dx+y/x=x^2y^6求通解 ∫x/(x^2+5x+6)dx